.main-loader {
    position: absolute;
    top: 0px;
    bottom: 0px;
    left: 0px;
    right: 0px;
    margin: auto;
    width: 175px;
    height: 100px;
}
.main-loader span {
    display: block;
    background: #ccc;
    width: 7px;
    height: 10%;
    border-radius: 14px;
    margin-right: 5px;
    float: left;
    margin-top: 25%;
}
.main-loader span:last-child {
    margin-right: 0px;
}
.main-loader span:nth-child(1) {
 animation: load 2.5s 1.4s infinite linear;
}
.main-loader span:nth-child(2) {
 animation: load 2.5s 1.2s infinite linear;
}
.main-loader span:nth-child(3) {
 animation: load 2.5s 1s infinite linear;
}
.main-loader span:nth-child(4) {
 animation: load 2.5s 0.8s infinite linear;
}
.main-loader span:nth-child(5) {
 animation: load 2.5s 0.6s infinite linear;
}
.main-loader span:nth-child(6) {
 animation: load 2.5s 0.4s infinite linear;
}
.main-loader span:nth-child(7) {
 animation: load 2.5s 0.2s infinite linear;
}
.main-loader span:nth-child(8) {
 animation: load 2.5s 0s infinite linear;
}
.main-loader span:nth-child(9) {
 animation: load 2.5s 0.2s infinite linear;
}
.main-loader span:nth-child(10) {
 animation: load 2.5s 0.4s infinite linear;
}
.main-loader span:nth-child(11) {
 animation: load 2.5s 0.6s infinite linear;
}
.main-loader span:nth-child(12) {
 animation: load 2.5s 0.8s infinite linear;
}
.main-loader span:nth-child(13) {
 animation: load 2.5s 1s infinite linear;
}
.main-loader span:nth-child(14) {
 animation: load 2.5s 1.2s infinite linear;
}
.main-loader span:nth-child(15) {
 animation: load 2.5s 1.4s infinite linear;
}
@keyframes load {
	0% {
		background: #ccc;
		margin-top: 25%;
		height: 10%;
	}
	50% {
		background: #444;
		height: 100%;
		margin-top: 0%;
	}
	100% {
		background: #ccc;
		height: 10%;
		margin-top: 25%;
	}
}